When you are doing instancing your input layout might look something like this (from Frank Luna's DX11 book):
const D3D11_INPUT_ELEMENT_DESC InputLayoutDesc::InstancedBasic32[8] =
{
{"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0},
{"TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 24, D3D11_INPUT_PER_VERTEX_DATA, 0},
{ "WORLD", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0, D3D11_INPUT_PER_INSTANCE_DATA, 1 },
{ "WORLD", 1, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 16, D3D11_INPUT_PER_INSTANCE_DATA, 1 },
{ "WORLD", 2, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 32, D3D11_INPUT_PER_INSTANCE_DATA, 1 },
{ "WORLD", 3, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 48, D3D11_INPUT_PER_INSTANCE_DATA, 1 },
{ "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 64, D3D11_INPUT_PER_INSTANCE_DATA, 1 }
};
My question is, what semantic names can I give to the instanced data? Here Frank Luna is using "WORLD" but I don't see that mentioned on any HLSL semantic reference pages. Also, what if I want to pass a view-projection matrix as part of the instanced data? Can I use "VIEWPROJ"? Does it matter? Does the runtime use the semantics at all?
Cheers!
↧
